What's the best approach for setting up connections with multiple carriers in a microservices architecture?

I'm working on a project where I need to set up connections with multiple carriers such as DHL, DPD, and PostNL for sending products to our customers. I'm planning to use a microservices architecture for this purpose.

My question is, should I create separate microservices for each carrier or everything in a single microservice? What would be the best approach in terms of maintainability, scalability, and performance?

I would appreciate any advice or recommendations based on your experience. Thank you in advance.